Grinding-machine.



A. B. LANDIS.

GRINDING MACHINE.

APPLICATION FILED APR. 18, 1901.

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Y a WW W m w m1 5 km, W n M 4/ M ATTORNEY UNITED STATES PATENT OFFICE.

ABRAHAM 2B. LANDis, or w'A'Ymisnono, PENNSYLVANTA, assiGNoR To LANDIS 'r'ooi'.

COMPANY, A conronarron or PENNSYLVANIA.

GRINDING-MACHINE.

Specification of Letters Patent.

Application filed April 18, 1907. Serial No. 388,957.

, certain new and useful Improvements in Grinding-Machines, of which the following is a specification. p

My said invention consists in certain im provements in 'the details of construction and arrangement of parts of g'rinding nachines, whereby the driving mechanism thereof is, or may be, entirely contained within the. machine itselfand the use of overhead or line shaftin'g is, or-may be, entirely dispensed with. H

This invention relates especially to an imrovement on that particular machine shown in my Patent No. 724,891 of April 7, 1903, all as will .be hereinafter more fully do scribed and claimed.

Referring to the accompanying drawings which are made a part hereof and on which similar reference characters indicate similar parts; Figure 1 is a top or plan View of a portion of 'a grinding machine embodying my said invention, Fig. 2 a transverse sec: tional view through the same on the dotted line 2--2 in Fig. 1, Fig. 3 a detail section on the dotted line 33 in Fig. 2, and Fig. 4 a detail view similar to a portion of Fig. 3 but on a larger scale. I

In said drawin s the portions marked A represent the be "of the machine, B the grinding wheel carriage, and G the grinding wheel base.

The bed A is or may be of any improved form or construction adapted to support the other parts of the machine.- It is provided with a work-supporting table'A on which is mounted the head-stock A and the footstock A for holding the work, as is usual.

The grinding wheel carriage B is mounted on suitable ways on said bed' A opposite to the work-holding table A and is operated to traverseba'ck and forth on said ways by means of a' longitudinally extending screw 7 which engages with a screw-threaded per foration in the lower end of the bracket 13', which depends from the underside of said carriage. Said screw 12 is supported at its outer ends in suitable bearingsin the of the bed A and is provided at one end with a gear wheel I) with which a gear wheel a on a transverse shaft a (indicated by dotted 'lines journalcd in bearings on the bed A is adapted to engage. Said shaft a is'driven from the driving mechanism by any suitable connection (not shown), as will bereadily understood.

The wheel base C is mounted to-slidetransversely on the top of-said carriage B and carries the grinding wheel C which is mounted on a suitable shaft 0 journaled' in suitable bearings in said. base. A pulley- 0' is mountedon said shaft 0 bywhich power may be applied for driving it, as will be presently described. A rack-bar c is mount ed on the carriageB alongside the ways on which said wheel base is adapted to slideand a shaft 0 journaled in suitable bearings in said wheel base has a pinion c which en= gages with said rack-bar. A gear wheel 0 on the outer end of said shaft may be conf nectedwith any suitable driving mechanism, or operated by hand, to feed the wheel base with the grinding wheel toward the work. Said wheel base C is formed hollow and the Patented Jan. 4, 191 0.

carriage Bis formed with an opening im ings a? in said bed being provided with a pulley 2 on its outer end by which it maybe geared to the driving power. A pulley 3 is mounted on said shaft beneath. the wheel base C and is belted to the driving pulley on the grinding wheel shaft 0 by a belt 4. Said belt passes over an idlerpulleyjc mounted on a shaft 0 in the wheelbase then over pulley o and then down over another idler pulley 0 on a. shaft 0, which is mounted' in bearings on the brackets 0 which depend from the under side of a plate C which is'mounted on the top of said wheel base C. A' lever formed in two parts o and 0 connected by a pivot c is ivoted .atits upper end to ears on'the top 0 said plate. 0'

by means of the. pivot c and at its lower endis connected to the lower rear side of the idler pulley b on a short shaft mounted in brackets b on the rear edge of the carriage B. The weight W by reason of this connection serves not only to keep the belt 4 taut by reason of the strain through the lever upon the pivot 0 which tends to draw the pulley 0 against the rear side of the belt but it also serves to take up any back-lash or vibration of the wheel base (J in operation and prevent the grinding wheelfrom being jarred or vibrated against the work.

The pulley 3 is mounted on the shaft 1 in the same manner as illustrated in my former patent above referred to, said shaft 1 being formed with longitudinal grooves 7 and 8 at diagonally opposite sides with which small anti-friction wheels 9 and 10 mounted on shafts l1 and 12 on the face of the pulley 3 are adapted to engage, thus securing said pulley to revolve said shaft but permitting its free movement longitudinally of the machine upon said shaft as the carriage B traverses back and forth. By this arrangement the entire driving mechanism may be concealed within the bed of the machine except the end of shaft 1 with pulley 2 thereon, which is cared to any suitable driving power. Said driving power may be a motor mounted upon the bed of the machine itself, if preferred, and a machine thus provided is entirely contained within itself and may be set up and operated without reference to line shafting such as is usually required to be in shops to-furnish power to such machinery.

Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a grinding machine, the combination, of the bed, the grinding wheel carriage mounted to traverse back and forth on said bed, means for traversing said carriage, the grinding wheel base mounted to slide transversely on the top of said carriage, said base being formed hollow and an opening being formed through the carriage beneath said base to within the grinding machine bed, a driving shaft journaled in bearings within said bed, a pulley mounted on said shaft to turn therewith and slide thereon, a belt connecting said pulley with a pulley on the grinding wheel spindle said belt passing through said opening in the carriage and the grinding wheel base and over suitable idler ulleys, substantially as set forth.

2. n a grinding machine, the combination, of the bed, the grinding wheel carriage mounted to traverse longitudinally on said bed, the grinding wheel base mounted to slide transversely on said carriage, the grinding wheel mounted on a spindle journaled in hearings on said base, a pulley on said spindle, a driving shaft mounted within said bed, a pulley mounted on said shaft to rotate therewith and slide thereon, a belt running from said pulley to the pulley on the grinding wheel spindle through openings formed in the carriage and the grinding-wheel base, and idler pulleys mounted adjacent to said grinding wheel pulley for supporting said belt, substantially as set forth.

3. A grinding machine comprising a traversingcarriage having a wheel base mounted thereon adapted to slide transversely thereof, a driving shaft mounted within the bed of the machine, said wheel base and said carriage being formed with openings and the driving shaft and grinding wheel spindle being connected by gearing passing through said openings, substantially as set forth.

at. A grinding machine'comprising a traversing carriage, the wheel base mounted thereon, the grinding wheel journaled on said wheel base, said wheel base and carriage being formed with openings leading to the interior of the bed of the machine, the driving shaft journaled within said bed a sliding pulley on said driving shaft, an a belt extending from said pulley through the openings in said carriage and said wheel base over supporting idler pulleys to the pulley on the grinding wheel spindle, substantially as set forth.

5. A grinding machine comprising a traversing carriage, the wheel base mounted to slide transversely on said carriage, said wheel base and carriage being formed with openings leading to within the grinding machine bed, the driving shaft within said bed, a belt leading from a' pulley on said driving shaft through said openings to a pulley on the grinding wheel spindle, idler pulleys mounted to support said belt one of said pulleys bein mounted on a moving part, and a weig t connected with said moving part for holding it against said belt, whereby said belt is held under tension, substantially as set forth.

6. A grinding machine comprising a traversing sliding wheel base, a belt connecting the grindin wheel on said base with the driving shaft, an idler pulley mounted beneath said belt on the wheel base, and a weight connected to the supports of said pulley and adapted to draw it against said belt for tightening the same, substantially as set forth.

7. In a grinding machine, the combination, of the bed, the traversing carriage, the wheel base mounted to slide transversely on. said carriage, the grinding wheel mounted" on a spindle journaled in hearings on said wheel base, the driving shaft mounted with? in said bed, the belt extending through openings in said carriage and base connecting said shaft and the grinding wheel spindle, an idler pulley mounted on a moving part on said wheel base under said belt, and a weight connected to the rear end of said 13th day of April, A. D. nineteen hundred wheel base and to the support of said idler pulleyil, wheregybit1 1s ailiapted to operate both and seven. to tig ten sai e t an to take up the backv lash of said wheel base, substantially as set ABRAHAM LANDIS' V Y 5 forth. Witnesses:

In witness whereof, I have hereunto set SHERMAN A. MILLER,

my hand and seal at Waynesboro,Pa., this GEORGE H. DICKEL- 

